#include <stdio.h>
#include <unistd.h>
int main(int argc, char const *argv[])
{
        int ret = 0;
        ret = alarm(6);
        printf("ret = %d\n",ret);
        sleep(2);
        ret = alarm(5);
        printf("ret = %d\n",ret);
        while (1){
                printf("lai da wo ba!\n");
                sleep(1);
        }
        return 0;
}
